Answer:
Option D Product Improvement
Explanation:
In the product improvement phase the product has some extra features that makes it bit differentiated. So it is not new to the world because everybody uses soap nowadays. I would say better than soap are used, for face we use facewash, for body we use bodywash and for hands we use handwash. so the market has moved from general product to specialization moves. Line extension is the increase in the products portfolio. And new to the firm products are the products that are 100% new to the product portfolio for example Nokia started making tyres which is new to the firm product Or Apple has started making Titan cars which will use environment friendly source of energy for movements on the road.